Modified reporter to Jacob as he made me aware of it and should get point credit when resolved.

Automated response: When replying, getting the CAPTCHA wrong cancels out the reply functionality

The dynamically-injected POST parameter "parent_id" which controls what we are replying to is not re-processed when going back in navigation. This hotfix attempts to fix that, but has not yet been thoroughly tested.

The issue will be marked resolved when confirmed the bug has been fixed.

This is now resolved in an additional commit which fixes the following:

- If an error occurs in AJAX commenting, we do *not* try to re-submit the comment form with a traditional request because sometimes this will cause more issues (re-triggering bad errors, hack attacks, loops, etc) and will sometimes hide the error that occurred (and pops up in an overlay)
- Comments posting form missing "useCaptcha" parameter which means the CAPTCHA was not being checked through AJAX for correctness before the comment gets posted.

With all of these fixes, this should indirectly fix the main bug because in no instance would the page navigate away during an error and cause the parent_id to go missing (and thus a comment becoming top-level).